Publications

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Conference Paper
Bond Behaviour of Prestress Steel Strands Bonded with an Epoxy Adhesive and a Cement Grout for Flat Slab Strengthening Purposes – Experimental Study, Faria, Duarte, Ramos António, and Lúcio Válter , 3rd fib International Congress - 2010, Washington, p.1–10, (2010) Abstract

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Comparison of flat slab strengthening techniques against punching-shear, Lapi, Massimo, Martini Daniele, Zagli Emilio, Orlando Maurizio, Ramos Antonio, and Spinelli Paolo , Proceedings of The New Boundaries of Structural Concrete 2016, NBSC2016, Italy ACI Chapter, Capri, Italy, (2016) Abstract

Punching-shear capacity of slab-column connections in existing R/C structures may be inadequate to bear design loads, so strengthening works are required. The lack of punching resistance may be due to detailing, design or building errors; in other cases, such lack is due to a change of use, which requires an increase of resistance. Different techniques have been developed for strengthening R/C slabs against punching: enlargement of the support, gluing external fibre reinforced polymers or casting a bonded concrete overlay (BCO) on the slab's top surface, insertion of post-installed steel bolts, application of fibre reinforced polymers cords as shear reinforcement. In the paper, the authors apply the Critical Shear Crack Theory (CSCT) to all of these techniques and evaluate their efficacy with reference to a case study.

Eccentric punching strength of rc slab-column connections: A parametric numerical analysis based on the lisbon setup, Teoni, Emanuele, Secci Lorenzo, Lapi Massimo, Ramos Antonio Pinho, and Orlando Maurizio , fib Symposium, Volume 2021-June, p.1640 – 1647, (2021) Abstract
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Estudo Experimental de Punçoamento em Lajes Fungiformes Pré Esforçadas, a Ramos, and Lúcio V. , Encontro Nacional Betão Estrutural 2004, Porto, (2004) Abstract

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Estudo Experimental do Punçoamento Cíclico em Lajes Fungiformes Reforçadas com Pré-Esforço Transversal, Luis, Marta, and Ramos António , Encontro Nacional Betão Estrutural 2008, Guimarães, (2008) Abstract

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Finite element analysis of punching shear of R/C slabs: A hybrid approach for model calibration, Secci, L., Teoni E., Lapi M., Orlando M., and a Ramos , Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, p.643-650, (2019) Abstract
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Flat Slabs under Cyclic Reversed Horizontal Loads, Almeida, André, Lúcio Válter, and Ramos António , 3rd NOVA-Yamaguchi International Seminar – Earthquake Resistant Structures, Caparica, (2016)
Material and geometrical parameters affecting punching of reinforced concrete flat slabs with orthogonal reinforcement, Faria, Duarte, Biscaia Hugo, Lúcio Válter, and Ramos António P. , fib Symposium Prague 2011 - Concrete Engineering for Excellence and Efficiency, Prague, (2011) Abstract

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Post-earthquake strength and deformation capacity of a flat slab specimen with shear studs, Isufi, B., Lúcio V., and Ramos A. P. , Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, p.1684-1691, (2019) Abstract
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Punching of reinforced concrete slabs and experimental analysis and comparison with codes, Faria, Duarte, Biscaia Hugo, Lúcio Válter, and Ramos António , IABSE-Fib Codes in Structural Engineering – Developments and Needs for International Practice, Dubrovnik, p.1–10, (2010) Abstract

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Punching of Steel Fibre Reinforced Concrete Flat Slabs, Gouveia, Nuno, Fernandes Nelson, Faria Duarte, Ramos António, and Lúcio Válter , fib symposium Tel Aviv 2013, Tel Aviv, p.1–4, (2013) Abstract

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Punching Research at Universidade Nova de Lisboa, a Ramos, Lúcio V., Faria D., and Inácio M. , Design Of Concrete Structures and Bridges Using Eurocodes, Bratislava, (2011) Abstract

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Punçoamento de lajes fungiformes reforçadas com parafusos – efeito da área e posicionamento da ancoragem, Inácio, Micael, Ramos António, Lúcio Válter, and Faria Duarte , Encontro Nacional Betão Estrutural 2012, Porto, p.1–8, (2012) Abstract

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Reabilitação Estrutural de Edifícios com Pós-Tensão, Lúcio, Válter, Faria Duarte, Ramos António, and Ferreira João , ReHabend 2014, Santader, (2014) Abstract

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Reabilitação Sustentável de Estruturas –Reforço de Lajes de Edifícios de Betão Armado, Faria, Duarte, Lúcio Válter, and Ramos António Pinho , CRSEEL – 2ª Conferência Construção e Reabilitação Sustentável de Edifícios no Espaço Lusófono, Lisbon, (2012) Abstract

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Reforço de lajes com recurso a pós tensão com ancoragens por aderência, Faria, Duarte, Lúcio Válter, and Ramos António , Encontro Nacional Betão Estrutural 2012, Porto, p.1–8, (2012) Abstract

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Reforço de Lajes Fungiformes – Anomalias, Causas e Soluções, Lúcio, Válter, Ramos António, and Faria Duarte , SILE2008 – Seminário Internacional sobre Ligações Estruturais, Lisbon, p.1–10, (2008) Abstract

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Rehabilitation of Historical Masonry Bridges, Rodrigues, Neuza, Ramos António, and Branco Fernando , 1st International Conference Construction Heritage in Coastal and Marine Environments – Damage, Diagnostic, Maintenance and Rehabilitation, Lisbon, p.1–10, (2008) Abstract

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Repair and Strengthening Methods of Flat Slabs for Punching, Ramos, Antonio, Lucio Valter, and Regan Paul E. , International Workshop on Punching Shear Capacity of RC Flat Slabs, Stockholm, p.125–133, (2000) Abstract

The present work reports experimental research carried out on repair and strengthening methods of flat slabs for punching. The repair and strengthening methods studied are: strengthening using transversal prestress, repair by substitution of the damaged concrete; and strengthening using steel beams as a column head, connected to the column and to the slab with epoxy resin and mechanical expansion anchors. Four experimental test slabs (AR1 to AR4) were produced and tested: two with transversal prestress, one only repaired and one strengthened with a steel column head. The execution process, its efficiency and design, are discussed.

Resposta da ligação pilar-laje fungiforme sujeitas a ações horizontais cíclicas reforçadas com estribos, Almeida, André, Ramos António, Marreiros Rui, Lúcio Válter, and Faria Ricardo , Encontro Nacional Betão Estrutural 2018, 7-9 Nov., LNEC, Lisboa, (2018)
Safety on Punching of Prestressed Flat Slabs, Ramos, António, and Lúcio Valter , fib congress 2006, Naples, (2006) Abstract

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Seismic behaviour of slab-column connections with various punching shear enhancement methods, Isufi, Brisid, Marreiros Rui, Ramos António Pinho, and Lúcio Válter , fib Symposium, Volume 2021-June, p.978 – 986, (2021) Abstract
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Sistemas de Reforço de Lajes Fungifirmes, Faria, Duarte, Lúcio Válter, and Ramos António , SILE2011 -Seminário Internacional sobre Ligações Estruturais, Lisbon, p.1–10, (2011) Abstract

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Static and seismic behaviour of R/C slabs with openings adjacent to columns, Lapi, M., Orlando M., Spinelli P., and a Ramos , Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, p.1795-1802, (2019) Abstract
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Strengthening of concrete Flat Slabs with an Overlaid Reinforced Concrete Layer, Fernandes, Hugo, Lúcio Válter, and Ramos António , fib Symposium 2016 - Performance-based Approaches for Concrete Structures, Cape Town, (2016)